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31. 发明授权

US06373428B1 Self locking dual frequency clock system 有权
标题翻译：自锁双频时钟系统
公开(公告)号：US06373428B1
公开(公告)日：2002-04-16
申请号：US09282947
申请日：1999-04-01
申请人： Thomas E. McEwan
发明人： Thomas E. McEwan
IPC分类号： G01S1300
CPC分类号： G01S13/10 , G01S7/28
摘要： Two crystal oscillators are configured as a “plug-and-play” precision transmit-receive clock system that requires no calibration during manufacture. A first crystal oscillator generates a transmit clock and a second crystal oscillator generates a receive clock that operates at a small offset frequency &Dgr; from the transmit clock. A frequency locked loop regulates &Dgr; by regulating the frequency of the detected receive pulses from a radio, radar, laser, ultrasonic, or TDR system. The clock system further includes a wrong sideband reset circuit and a phase lock injection port. Applications include a timing system for automotive backup and collision warning radars, precision radar and laser rangefinders for fluid level sensing and robotics, precision radiolocation systems, and universal object/obstacle detection and ranging.
摘要翻译：两个晶体振荡器被配置为“即插即用”精密发射 - 接收时钟系统，在制造过程中不需要校准。第一晶体振荡器产生发送时钟，第二晶体振荡器产生接收时钟，该接收时钟以来自发送时钟的小偏移频率DELTA工作。频率锁定环通过调节来自无线电，雷达，激光，超声波或TDR系统的检测到的接收脉冲的频率来调节DELTA。时钟系统还包括错误的边带复位电路和相位锁定注入端口。应用包括用于汽车后备和碰撞警报雷达的定时系统，用于液位感测和机器人的精密雷达和激光测距仪，精密无线电定位系统以及通用对象/障碍物检测和测距。

32. 发明授权

US06320532B1 Low power radar level transmitter having reduced ground loop errors 有权
标题翻译：低功率雷达液位变送器具有降低的接地回路误差
公开(公告)号：US06320532B1
公开(公告)日：2001-11-20
申请号：US09321143
申请日：1999-05-27
申请人： Kurt C. Diede
发明人： Kurt C. Diede
IPC分类号： G01S1332
CPC分类号： G01S7/28 , G01F23/284 , G01S13/88
摘要： A low power radar level transmitter having reduced ground loop errors and a related method are disclosed. A microwave termination is couplable to a reference voltage such as earth ground and is coupled to a microwave transceiver through at least one low frequency isolator. The microwave transceiver generates a microwave signal along the termination which is reflected by a process product interface. A level calculator is coupled to the microwave transceiver to calculate a level of the process product based upon the received, reflected signal. A process loop communicator is coupled to the level calculator and couplable to a process control loop to communicate the calculated level across the process control loop. A power supply is couplable to the process control loop and provides power to all electrical components of the transmitter with energy received from the process control loop.
摘要翻译：公开了具有减小的接地回路误差的低功率雷达液位变送器和相关方法。微波终端可以耦合到诸如接地的参考电压，并且通过至少一个低频隔离器耦合到微波收发器。微波收发器沿着端接产生微波信号，该信号被过程产品接口反射。电平计算器耦合到微波收发器以基于所接收的反射信号来计算处理积的水平。过程回路通信器耦合到电平计算器并且可耦合到过程控制回路以在整个过程控制回路中传递计算的电平。电源可连接到过程控制回路，并通过从过程控制回路接收的能量向变送器的所有电气部件供电。

33. 发明授权

US06198425B1 Pulse doppler target detecting device 失效
标题翻译：脉冲多普勒目标检测装置
公开(公告)号：US06198425B1
公开(公告)日：2001-03-06
申请号：US05014833
申请日：1970-02-16
申请人： John J. Nastronero
发明人： John J. Nastronero
IPC分类号： F42C1304
CPC分类号： G01S13/56 , F42C13/04 , G01S7/28 , G01S7/36
摘要： A target detection device of the electromagnetic transmitter-receiver reaction type comprising a radio frequency oscillator which is integral with its radiating system and detector. It incorporates a pulse modulator which drives the oscillator to periods of high power transmission and a signal processing system to reject unwanted data and to effect detonation of the warhead at the optimum point on its trajectory.
摘要翻译：电磁发射机 - 接收机反应类型的目标检测装置包括与其辐射系统和检测器成一体的射频振荡器。它集成了一个脉冲调制器，它将振荡器驱动到高功率传输周期，以及一个信号处理系统，以消除不必要的数据，并在其轨迹上的最佳点对弹头进行爆震。

34. 发明授权

US4959654A Digitally generated two carrier phase coded signal source 失效
标题翻译：数字生成两个载波相位编码信号源
公开(公告)号：US4959654A
公开(公告)日：1990-09-25
申请号：US241688
申请日：1988-09-07
申请人： Merlin D. Bjorke , Baard H. Thue
发明人： Merlin D. Bjorke , Baard H. Thue
IPC分类号： G01S7/28 , G01S13/10 , G01S13/32 , G01S13/88
CPC分类号： G01S7/28 , G01S13/10 , G01S13/32 , G01S13/882
摘要： A high frequency signal is converted to a signal characteristic of two simultaneously present, closely spaced high frequency signals. A high frequency signal is passed through a controllable bi-phase modulating switch. The switch is controlled by the resultant output of a multiplier which multiplies the sign of two phase-related pulse trains.
摘要翻译：高频信号被转换为两个同时存在的紧密间隔的高频信号的信号特征。高频信号通过可控双相调制开关。开关由乘法器的合成输出控制，乘法器乘以两个相位相关的脉冲序列的符号。

35. 发明授权

US4843331A Coherent digital signal blanking, biphase modulation and frequency doubling circuit and methodology 失效
标题翻译：相干数字信号消隐，双相调制和倍频电路和方法
公开(公告)号：US4843331A
公开(公告)日：1989-06-27
申请号：US90821
申请日：1987-08-28
申请人： Steve S. Yang
发明人： Steve S. Yang
IPC分类号： H04L27/20 , G01S7/28 , G01S13/28 , H03M5/12
CPC分类号： H03M5/12 , G01S13/288 , G01S7/28
摘要： An information bearing signal (the object signal) for use in radar or radar-like circuitry is generated in a digital circuit and then converted through a bandpass matching filter into a corresponding analog signal. The object signal is then first combined in a NAND gate with a blanking control signal. In one embodiment, the selectively blanked object signal is frequency doubled by combining the blanked object signal and its quarter wave length shifted version in an EXCLUSIVE-OR gate. Thereafter, the frequency doubled version of the blanked object signal is combined in a second EXCLUSIVE-OR gate with a biphase modulation control signal which selectively inverts or noninverts the frequency doubled object signal. The output of the biphase modulated frequency doubled signal is then gated through a blanking NAND gate and coupled to the bandpass matching filter. In a second embodiment the blanked object signal is first combined in an EXCLUSIVE-OR gate with the biphase modulated control signal and therafter provided as an input to a second EXCLUSIVE-OR gate wherein it is combined with a quarter wave length version of the blanked object signal. The phase modulated frequency doubled signal is then coupled to a blanking NAND gate and bandpass matching filter as before. According to the values asserted for the biphase modulation control signal and blanking signal, the object signal is digitally frequency doubled, blanked and phase modulated as desired prior to conversion into analog form.

36. 发明授权

US4727375A Process for adapting the post integration in a switched pulse repetition frequency radar and a circuit implementing this process 失效
标题翻译：用于适配开关脉冲重复频率雷达中的后整合的过程和实现该过程的电路
公开(公告)号：US4727375A
公开(公告)日：1988-02-23
申请号：US810376
申请日：1985-12-18
申请人： Philippe Lacomme
发明人： Philippe Lacomme
IPC分类号： G01S13/26 , G01S7/28 , G01S7/292 , G01S13/22 , G01S13/528 , G01S7/30
CPC分类号： G01S13/22 , G01S13/528 , G01S7/28
摘要： The invention relates to a process for adapting the post integration in a switched pulse repetition frequency radar and a circuit implementing this process. For that, the post integration of the detected signals is effected as a function of the signal received from the Doppler filter. For that, switches are used controlled by comparator circuits.The invention is useful in frequency ambiguous coherent Doppler radars using recurrence frequency switching by blocks.
摘要翻译：本发明涉及一种用于适配开关脉冲重复频率雷达中的后整合的过程和实现该过程的电路。为此，检测信号的后整合是根据从多普勒滤波器接收的信号的函数来实现的。为此，开关由比较器电路控制。本发明在使用块重复频率切换的频率模糊相干多普勒雷达中是有用的。

37. 发明授权

US4721924A Device for tuning a VCO to the carrier frequency of each radar pulse 失效
标题翻译：用于将VCO调谐到每个雷达脉冲的载波频率的装置
公开(公告)号：US4721924A
公开(公告)日：1988-01-26
申请号：US852955
申请日：1986-05-12
申请人： Arturo Masdea , Pietro Bartolini , Gianfranco Colavito , Filippo Neri
发明人： Arturo Masdea , Pietro Bartolini , Gianfranco Colavito , Filippo Neri
IPC分类号： G01S7/28 , H03L7/087 , H03L7/14 , H03L7/06
CPC分类号： G01S7/28 , H03L7/087 , H03L7/14
摘要： An electronic device for rapidly tuning a voltage controlled oscillator to the radar carrier frequency of each of the individual radar pulses. A frequency discriminator (1) of the quadricorrelator type is supplied with the incoming pulses and with the output of the VCO (5) to provide the control voltage to the VCO (5) via amplifying stages (2), (4) and a sample-and-hold circuit (3) that maintains the tuned frequency for time durations greater than 100 usec. The operating frequency range of the device is between 6GHz-18GHz.
摘要翻译： PCT No.PCT / IT85 / 00014 Sec。 371日期：1986年5月12日 102（e）日期1986年5月12日PCT提交1985年7月3日PCT公布。出版物WO86 / 00768 日期1986年1月30日。用于将压控振荡器快速调谐到每个雷达脉冲的雷达载波频率的电子设备。四通道相关器类型的鉴频器（1）被提供有输入脉冲和VCO（5）的输出，以通过放大级（2），（4）和样本（5）向VCO（5）提供控制电压保持电路（3），其持续时间的调谐频率大于100 usec。器件的工作频率范围在6GHz-18GHz之间。

38. 发明授权

US4179694A Frequency control systems 失效
标题翻译：频率控制系统
公开(公告)号：US4179694A
公开(公告)日：1979-12-18
申请号：US862186
申请日：1977-12-19
申请人： Christopher J. Alder
发明人： Christopher J. Alder
IPC分类号： G01S7/28 , G01S9/02
CPC分类号： G01S7/28
摘要： An AFC system for a radar comprising means for changing in one sense a control voltage fed to a voltage controlled local oscillator forming part of the radar receiver when a predetermined number of cycles of a difference frequency between a local oscillator and a transmitted radar frequency obtain during a predetermined period until less than the predetermined number of cycles obtain whereupon the voltage is changed in the opposite sense whereby the frequency of the local oscillator is automatically controlled.
摘要翻译：一种用于雷达的AFC系统，包括用于在本地振荡器和发射的雷达频率之间的预定数量的不同频率的周期获得期间在一个感测中改变馈送到形成雷达接收机的一部分的电压控制本地振荡器的装置直到小于预定数量的循环，从而在相反的方向改变电压，从而本地振荡器的频率被自动控制。

39. 发明授权

US4075571A Externally biased video detector circuit for limiting clutter and noise in a detected radar signal 失效
标题翻译：用于限制检测到的雷达信号中的离合器和噪声的外部偏移视频检测器电路
公开(公告)号：US4075571A
公开(公告)日：1978-02-21
申请号：US804671
申请日：1977-06-08
申请人： Garry N. Hulderman , Jay B. Winderman
发明人： Garry N. Hulderman , Jay B. Winderman
IPC分类号： G01S7/28 , H03D1/06 , H03D1/10 , H03K9/00 , H03K19/12
CPC分类号： H03D1/06 , G01S7/28 , H03D1/10
摘要： A video detector circuit for a radar system, including a detector diode having one of its electrodes connected to an input terminal for detecting an applied signal containing target information, rms noise voltage and components that are representative of clutter, and its other electrode connected to a load terminal for providing a detected signal; and a load resistance connected between the load terminal and a bias terminal; wherein a dc potential is provided at the bias terminal to forward bias the detector diode to have a quiescent operating point below the midpoint of the knee portion of its characteristic curve, thereby limiting diode rms noise current and components in the detected signal that are representative of clutter. As a result both the signal-to-noise ratio and the target-to-clutter ratio of the video detector circuit are enhanced. A filter network is connected between the load terminal and an output terminal for providing an output signal at the output terminal in which low frequency components representative of clutter in the detected signal are suppressed.

40. 发明授权

US3870992A Radar system 失效
标题翻译：雷达系统
公开(公告)号：US3870992A
公开(公告)日：1975-03-11
申请号：US24756872
申请日：1972-04-26
申请人： AII SYSTEMS
发明人： HANNA JR DREXEL W
IPC分类号： G01S7/28 , G01S7/292 , G01S9/02
CPC分类号： G01S7/2925 , G01S7/28
摘要： In a radar system especially suitable for collision avoidance of ships at sea, the azimuth reporting resolution is improved by transmitting the radar signals so as to occur a plurality of times during the angle of beamwidth of a rotating radar antenna, and comparing the resulting echoes of successive radar signals that occur at time periods corresponding to various ranges and identifying as target signals only those of the echoes in the respective range periods occurring for a certain plurality of scan cycles within the antenna beamwidth angle. The bandwidth requirements of the system for communication from a plurality of such mobile stations to a central station are reduced by digitizing at the ships the range and azimuth data corresponding to said identified target signals and by treating as valid target signals those echoes that are repeated over successive frame cycles, and by reporting to the central station only such target information. Those echoes that are not repeated over successive sweep cycles are treated as non-target information or false alarms. A noise threshold for the detection of echo signals at the input is adjusted depending upon the number of false alarms (non-repeated target signals) in a frame. Only a limited number of targets at any azimuth location are reported. If at some point the number of valid target signals in an antenna frame matches some predetermined value, then the target data for only that first portion of the frame are reported to the central station. During the succeeding frame, the report to the central station starts at the azimuth limit where the previous frame report left off.
摘要翻译：在特别适用于海上碰撞避雷的雷达系统中，通过在雷达天线的波束宽度的角度内发射雷达信号多次，提高方位报告分辨率，并比较得到的回波在相应于各种范围的时间段发生的连续的雷达信号，并且仅识别在天线波束宽度角内的某个多个扫描周期内出现的各个范围周期内的回波的目标信号。通过在船舶上数字化与所识别的目标信号对应的范围和方位数据，并且将作为有效目标信号的那些回波视为重复的方式来减少从多个这样的移动站到中心站的通信系统的带宽要求连续的帧周期，并且只向中心站报告这样的目标信息。那些在连续扫描周期内不重复的回波被视为非目标信息或假警报。根据帧中的错误报警（非重复目标信号）的数量来调整用于检测输入端的回波信号的噪声阈值。报告在任何方位位置只有有限数量的目标。如果在某一点天线帧中的有效目标信号的数目与某个预定值相匹配，则仅将帧的第一部分的目标数据报告给中心站。在接下来的框架中，中央车站的报告从前一帧报告停止的方位角开始。

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